Unable to get Lazy loading of events to work for FullCalendar (sample included)

[ialexei]

I am trying to implement equivalent functionality of this... http://fullcalendar.io/docs/event_data/events_function/

However, my callback is not getting called when the dates are changed. Here is the sample I wrote to demonstrate the approach I have taken. https://github.com/ialexei/gwtbootstrap3-sample-app